misc: Update docker/README.md

[FabioLuporini]

• Mainly updates Docker instructions
• Split Docker CPU-GPU
• Add Devito pip package
• Drop duplicated text

[FabioLuporini]

According to

https://devitocodes.slack.com/archives/CDY6PGHU5/p1658219773567919

we could explain how to launch jupyter notebooks from within docker (eg some sample commands)

We could/should also clarify that the base images at the docker hub should not be used directly as they don't provide devito. Thoughts?

[codecov[bot]]

Codecov Report

Merging #1972 (0876877) into master (85a9aa5) will decrease coverage by 0.12%. The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #1972      +/-   ##
==========================================
- Coverage   87.79%   87.66%   -0.13%     
==========================================
  Files         214      214              
  Lines       37107    37109       +2     
  Branches     5587     5588       +1     
==========================================
- Hits        32578    32533      -45     
- Misses       4006     4055      +49     
+ Partials      523      521       -2     

Impacted Files	Coverage Δ
examples/seismic/source.py	83.33% <ø> (ø)
examples/seismic/utils.py	74.65% <50.00%> (ø)
devito/arch/compiler.py	38.05% <0.00%> (-6.04%)	:arrow_down:
devito/arch/archinfo.py	37.77% <0.00%> (-4.37%)	:arrow_down:
devito/data/allocators.py	78.14% <0.00%> (-1.10%)	:arrow_down:
devito/tools/data_structures.py	67.78% <0.00%> (-0.46%)	:arrow_down:

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[georgebisbas]

Maybe we can merge with: https://github.com/devitocodes/devito/pull/1920 ?

[FabioLuporini]

@georgebisbas sure, I didn't see it, sorry. I can close this PR. Is there anything you want to pull in your 1920? Feel free to copy-paste edits, then I'll close it and delete teh branch

Ah, could you in 1920 also update the docker README tag s.t. it shows "latest" instead of "gpu-4.6.2"? it's trivial, u just need to edit the link

[FabioLuporini]

with this PR we should also edit the docker tag in the main README, to show "latest" rather than gpu-... (@georgebisbas )

[FabioLuporini]

also TODO: fix link to FAQs in the main README.md !!!

[georgebisbas]

Will push fixes now

[georgebisbas]

@George Bisbas when you push again to the README PR, could you also update FAQ.md with the proper set of DEVITO_ARCH flags? https://github.com/devitocodes/devito/blob/master/FAQ.md#table-of-values-for-devito-environment-variables I’ve just realised there are a few missing (nvc, cuda, …) (Asking you so that we avoid multiple useless CI spins)

[georgebisbas]

@AtilaSaraiva, thanks for the input. I think that we cannot include something that is not officially under Devito CI and cannot guarantee support (?) I will wait for input from @FabioLuporini and @mloubout.

[AtilaSaraiva]

@AtilaSaraiva, thanks for the input. I think that we cannot include something that is not officially under Devito CI and cannot guarantee support (?) I will wait for input from @FabioLuporini and @mloubout.

I can create a CI then no prob. I have already done it for another package under my wing.

[georgebisbas]

todo: move docker-related text from download.rst to docker/readme.md

add a special section: #Developing Devito with Docker

[mloubout]

So what's the status here?